Freelancer profile translated to English.
Back to original languageAbout Sarra
I support organizations in redesigning and aligning their Data & AI architectures.
My approach is systemic: flux diagnosis, restoration of technical consistency, and alignment of Data/Cloud teams.
Specialized in GCP (BigQuery, Airflow, Dataflow, Cloud Run), I undertake recovery, migration, governance, and technical excellence missions.
References: Renault Digital, Fnac Darty, BPCE, Natixis.
Available for senior / architecture / strategic consulting missions.
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km)
Experience
- Renault DigitalSenior Data Engineer / GenAI ArchitectMay 2025 - November 2025 (6 months)• Diagnosis and redesign of an internal GenAI platform (upload → parsing → embeddings → search).• Stabilization of the MongoDB Atlas ingestion chain (rebuild of textual and vector indexes, consistency check).• Design of a target GCP architecture: Cloud Run + Dataflow + Airflow to decouple processing.• Executable documentation and knowledge transfer to Data & Cloud teams.Stack: Python, GCP (Cloud Run, Dataflow, BigQuery, Airflow), MongoDB, GitLab CI/CD, RAG, OpenAPI, GKE.
- Fnac DartyData Engineer GCPAugust 2023 - December 2024 (1 year and 4 months)
- Migration of Bash scripts (crontab on VM) to Airflow, to make processing reliable and industrialized
- Code refactoring (documentation, factorization, Python upgrade) and implementation of CI/CD via GitLab & Terraform
- Optimization of Looker Studio dashboards (clustering, BigQuery splitting) to reduce costs
- Automation of customer review moderation with an LLM model (Text-Bison) deployed via Cloud Function
- BPCE Infogérance & TechnologiesData Engineer & Tech Lead Streaming FactoryDecember 2017 - April 2023 (5 years and 4 months)
- Successive roles:
1. Creation & Management of the Streaming Factory (2021 – 2023)Development of real-time pipelines & standardization of best practicesDeployment of distributed architectures (Kafka, NiFi)Recruitment and skill development of Data Engineers in streamingStack: Kafka, NiFi, Solr, Hive, GCP, Java, Python2. Data Engineer / Tech Lead – BPCE Referential, Financing & Trade (2021 – 2022)Support for business teams on Hadoop, from design to implementationPySpark scripts to analyze XML files and store data in HiveDevelopment and optimization of data flows for the Referential Data LakeStack: CDP, Hive, Spark, Kafka (Python lib), PySpark, CI/CD (XLDeploy, Jenkins)3. Industrialization & Best Practices – BPCE Life Insurance (2019 – 2020)Industrialization of data science models (origination score)Implementation of reusable templates (versioning, logging, packaging)Collaboration on Group guidelines for model industrializationStack: Python, PySpark, Jupyter, Git, Cookie Cutter4. Data Engineer – Trade & Treasury (2019 – 2020)Data transfer to HDFS and deployment of fraud algorithms (scoring, profiling)Stack: HDP, Hive, Python, PySpark, Git, CI/CD5. Data Engineer – Full Trade Monitoring (2018 – 2019)Implementation of a Data Lake (Kafka, Hive, Solr, PySpark) and a Flask search engineClose collaboration with Data Science & business teams
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Education
- Master in Big Data and Machine LearningUniversity Paris 82017- Cours connexes : Intelligence artificielle, plateformes Big Data, sécurité informatique, algorithmes avancés} - Réalisation d'un mémoire portant sur la prédiction de la maladie de Parkinson à l'aide de données provenant de smartphones (Data Set Kaggle), SVM, WEKA, Python, (publications ACM)
- Bachelor's degreeUniversity Paris 82015Licence en Conception, Développement et Validation des Applications
Certifications
- Google Cloud Certified Professional Data EngineerGoogle Cloud2023